Malicious PDF — malware analysis report

Static analysis result for SHA-256 507bed002b3b2004…

MALICIOUS

PDF

33.6 KB Created: 2021-07-06 02:24:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b225923b1d6d9d089b8f0fb59bc2ed69 SHA-1: c283dc08cbf0f904099462d53b85bfc037c4bb09 SHA-256: 507bed002b3b2004e5be73fe2a8c731b58a4439331b71d48f9c61c83223d8aa3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/406889139/coin-master-15-free-spin-link-of-last-5-days-game-hack PDF link annotation
    • http://www.repion.com/uploaded_files/userfiles/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/roblox-free-stuff-pastebin_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/como-hackear-a-alguien-de-roblox-y-tener-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/free-robux-no-verifacation-or-scam-mobile_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/how-to-get-free-wings-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/freer-pro-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/grabpoints-robux_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_001_off00002b44.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2B44 22980 bytes
SHA-256: 2916131d50c74491e82ff7498b6b7e01b52b0acc43ad8ff89ef040093602d381
font_01_sfnt_off00005ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF1 18932 bytes
SHA-256: ab5bf67824d9f1de49592764067eca3c5a6c622e8f4c11d8ed5e999977e69fe8

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